Stel MAX dp 171C Manual De Instrucciones Para El Uso Y El Mantenimiento página 46

MAX dp 171-201C
TECHNICAL DESCRIP-
COD. 6910700020
Angle (α)
30
60 – 90
90 –120
b) Choosing and preparing the electrode
- The electrodes normally used are of cerium tungsten (2% cerium, grey in colour)
and the following diameters are recommended depending on the current:
- A tip is made on the electrode as shown in the figure.
- Angle a varies as the welding current varies; the following table recommends the
value:
c) Weld material
-
Many kinds of materials may be treated, however there are some basic rules
1 ) the rods of weld material must have the same mechanical and chemical proper-
ties as the material to be welded ;
2)
it is recommended not to use parts of the base material, as they could contain im-
purities due to the work process ;
3) if the material used has a different chemical composition, it is advisable to assess
the final characteristics of the joint, both mechanical and anti-corrosive.
d) Protection gas
- The protection gas normally used is pure argon with a quantity that varies accord-
ing to the current used (4-6 I/min).
- The TIG process is indicated for welding steel (both carbon steel and alloys), it
gives a weld with an excellent appearance which limits subsequent processing and
is often used for the first pass on pipes.
44
ENGLISH
Welding current A
5 - 30
30 - 120
120 - 160
:
STEL s.r.l. – Via del Progresso n° 59 – 36020
Loc. Castegnero (VICENZA) - ITALY
TEL. +39 444 639525 (central.) – +39 444 639682 (comm.)
FAX +39 444 639641 – E-mail: stel @ stelgroup.it
http: www.stelgroup.it
MAX dp 171-201C
DEUTSCH
COD. 6910700020
1) Auf WIG-Modalität kann man das Schweißen mit der Absinkrampenfunktion (slope-
down) beenden, indem man auf die Entfernung des Lichtbogens vom Werkstück einwirkt.
2) Indem man die Absinkrampe auf OFF stellt, muss der Arbeiter den Lichtbogen abreis-
sen, um das Schweißen zu beenden.
Auf Abbildung Nr. 1 sehen wir, dass man für das Beenden des Schweißverfahrens den
Brenner vom Werkstück abheben kann, womit die Absinkrampe beginnt.
STEL s.r.l. – Via del Progresso n° 59 – 36020
Loc. Castegnero (VICENZA) - ITALY
TEL. +39 444 639525 (central.) – +39 444 639682 (comm.)
FAX +39 444 639641 – E-mail: stel @ stelgroup.it
http: www.stelgroup.it
TECHNISCHE BESCHREIBUNG
ABB. NR. 1
105